具柔切功能太陽光電最大功率追蹤器之研製

本文旨在研製一具柔性切換功能之最大功率追蹤器，使太陽能電池輸出能夠穩定維持在最大功率輸出，並且達到開關的柔性切換以減少損失，使轉換效率不高的太陽能電池輸出能量可以達到有效的利用。最大功率追蹤法則採取擾動觀察法，此演算法簡單且穩定，被廣泛使用在各個太陽能光電系統。最大功率追蹤器的基本結構是昇壓型轉換器型態，為了達到最大功率追蹤法則所產生的電流命令，此轉換器採取定電流控制，最後提出一柔性切換緩衝器用以減少此系統的切換損失。　　使用MATLAB/simulink模擬軟體對此系統做模擬與分析，依此為根據再透過實作來實際驗證此系統的可行性，完成此最大功率追蹤器。

關鍵字

最大功率追蹤；柔性切換；太陽能光電系統；電力轉換器

並列摘要

A maximum power point tracker with soft-switching is the purpose of this thesis. It can reduce the switching loss and achieve soft-switching by a passive snubber, and the PV cells can operate to its maximum power by having Maximum Power Point Tracking (MPPT) implemented. MPPT algorithm uses an easy and stable method named “P&O”, which is widely used in PV system. The structure of the tracker is to boost converters, by constant current control to achieve the current command from MPPT algorithm. At last a soft-switching snubber is used to reduce the switching loss. This system is simulated and confirmed by MATLAB/Simulink, and the tracker for PV systems is implemented by DSP. The experiment results will be given in this thesis.

並列關鍵字

Maximum Power Point Tracking (MPPT) ； soft-switching ； photovoltaic system ； power converter

參考文獻

[1] 姚竺君，「三相併聯型太陽光電能系統模型建立與模擬分析」，國立臺灣大學電機所碩士論文，2010。

[3] S. B. Kjaer, J. K. Pedersen and F. Blaabjerg, "A review of single-phase grid-connected inverters for photovoltaic modules", IEEE Trans. Ind. Appl., vol. 41, pp. 1292-1306, 2005.

[4] M. M. Jovanovic and Y. Jang, "State-of-the-art, single-phase, active power-factor-correction techniques for high-power applications—An overview", IEEE Trans. Ind. Electron., vol. 52, pp. 701-708, 2005.

[5] G. Hua, E. X. Yang, Y. Jiang, and F. C. Lee, "Novel zero-current-transition PWM converters", Proc. IEEE PESC"93, pp. 538-544, 1993.

[6] K. Smith and K. Smedley, "Engineering design of lossless passive soft switching methods for PWM converters─Part I: With minimum voltage stress circuit cells", IEEE Trans. Power Electron., vol. 16, pp. 336-344, 2001.

國際替代計量

具柔切功能太陽光電最大功率追蹤器之研製

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